Typically, elephants have only one baby at a time. But over a lifetime, a female elephant can have up to six babies.
On rare occasions, yes.
Yes, cows typically give birth while lying down. This position allows them to push more effectively and ensures a safe delivery for the calf. Lying down also reduces the risk of injury to both the cow and the newborn calf.
No. Time of weaning does not affect the length of gestation in a cow.
Yes. A polled beef cow that is more than likely heterozygous for the horned gene, and the sire that could have been horned or also heterozygous for horns is more than likely to produce a horned calf.
African elephants typically give birth during the rainy season, which varies depending on the region. In general, births tend to occur more frequently during periods of higher food availability and water sources.
Hippos can mate, but they poygamous, which means they mate with more than one partner.
It depends on the age of that cow or heifer, what position the calf is in when it enters the birth canal, and what size the calf is. Some may even say that it also depends on the sex of the calf as well. It should only take a few hours or more for the calf to start to emerge during the early stages of labour, being presentation of the water sac and the calf's front hooves. Once the water sac emerges, it usually takes from a half hour to an hour for the calf to be expelled. Most cows that have had experience will only take 10 to 30 minutes to "spit" the calf out. Cows that have been bred to a bull that does not have the genetics for easy calving tend take longer due to the fact that they have a bigger calf to push out. Heifers, on the other hand, may take several hours to give birth because of their smaller pelvic opening. Heifers that have not been bred to a calving-ease bull tend to end up with more problems, and will take longer to calve out. If a calf is not in the proper position it will also take longer, and may end up needing help from a vet or the rancher/farmer to pull the calf out and ensure the cow/heifer and calf's survival. As far as the sex of the calf is concerned, there are some claims that if a cow retains a calf for longer or takes longer to give birth the calf's a bull calf; the opposite is true if it's a heifer. Not sure if this has any scientific merit, or if it's just some old wive's tales.
A cow should ideally give birth within 2-4 hours of the onset of labor. If labor surpasses this timeframe, there could be complications, such as a breach birth or the calf getting stuck, requiring veterinary assistance. It's important to monitor the cow closely during labor to ensure both her and the calf's well-being.
The male calf is always known to be heavier than females. Heifer calves (Holstein) are known to have a birth weight of approximately 80 pounds whereas the bull calf can weigh about 90 pounds at birth. This weight can differ between each calf depending on genetics of the parents and growth of the calf while in the womb.
The average number of babies varies across animal species. For example, elephants usually give birth to one calf, while rabbits can have large litters of 6-10 babies. It's best to research the specific animal you are curious about for a more precise answer.
At birth, a Charolais calf averages around 60 lbs; some more, some less, depending on the birthweight value of the sire and the age of the dam.
Cows seldom have more than one calf at a time (Less than 10% of all calf births are twins, and triplets are incredibly rare; rare enough to warrant a newspaper story about it.)Hens don't "give birth" at all, they lay eggs, but it's rare for a hen to lay more than one egg per day.